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"""PyPI and direct package downloading""" import sys import os import re import shutil import socket import base64 from pkg_resources import ( CHECKOUT_DIST, Distribution, BINARY_DIST, normalize_path, SOURCE_DIST, require, Environment, find_distributions, safe_name, safe_version, to_filename, Requirement, DEVELOP_DIST, ) from setuptools import ssl_support from distutils import log from distutils.errors import DistutilsError from setuptools.compat import (urllib2, httplib, StringIO, HTTPError, urlparse, urlunparse, unquote, splituser, url2pathname, name2codepoint, unichr, urljoin, urlsplit, urlunsplit) from setuptools.compat import filterfalse from fnmatch import translate from setuptools.py24compat import hashlib from setuptools.py24compat import wraps from setuptools.py27compat import get_all_headers EGG_FRAGMENT = re.compile(r'^egg=([-A-Za-z0-9_.]+)$') HREF = re.compile("""href\\s*=\\s*['"]?([^'"> ]+)""", re.I) # this is here to fix emacs' cruddy broken syntax highlighting PYPI_MD5 = re.compile( '<a href="([^"#]+)">([^<]+)</a>\n\s+\\(<a (?:title="MD5 hash"\n\s+)' 'href="[^?]+\?:action=show_md5&digest=([0-9a-f]{32})">md5</a>\\)' ) URL_SCHEME = re.compile('([-+.a-z0-9]{2,}):',re.I).match EXTENSIONS = ".tar.gz .tar.bz2 .tar .zip .tgz".split() __all__ = [ 'PackageIndex', 'distros_for_url', 'parse_bdist_wininst', 'interpret_distro_name', ] _SOCKET_TIMEOUT = 15 def parse_bdist_wininst(name): """Return (base,pyversion) or (None,None) for possible .exe name""" lower = name.lower() base, py_ver, plat = None, None, None if lower.endswith('.exe'): if lower.endswith('.win32.exe'): base = name[:-10] plat = 'win32' elif lower.startswith('.win32-py',-16): py_ver = name[-7:-4] base = name[:-16] plat = 'win32' elif lower.endswith('.win-amd64.exe'): base = name[:-14] plat = 'win-amd64' elif lower.startswith('.win-amd64-py',-20): py_ver = name[-7:-4] base = name[:-20] plat = 'win-amd64' return base,py_ver,plat def egg_info_for_url(url): scheme, server, path, parameters, query, fragment = urlparse(url) base = unquote(path.split('/')[-1]) if server=='sourceforge.net' and base=='download': # XXX Yuck base = unquote(path.split('/')[-2]) if '#' in base: base, fragment = base.split('#',1) return base,fragment def distros_for_url(url, metadata=None): """Yield egg or source distribution objects that might be found at a URL""" base, fragment = egg_info_for_url(url) for dist in distros_for_location(url, base, metadata): yield dist if fragment: match = EGG_FRAGMENT.match(fragment) if match: for dist in interpret_distro_name( url, match.group(1), metadata, precedence = CHECKOUT_DIST ): yield dist def distros_for_location(location, basename, metadata=None): """Yield egg or source distribution objects based on basename""" if basename.endswith('.egg.zip'): basename = basename[:-4] # strip the .zip if basename.endswith('.egg') and '-' in basename: # only one, unambiguous interpretation return [Distribution.from_location(location, basename, metadata)] if basename.endswith('.exe'): win_base, py_ver, platform = parse_bdist_wininst(basename) if win_base is not None: return interpret_distro_name( location, win_base, metadata, py_ver, BINARY_DIST, platform ) # Try source distro extensions (.zip, .tgz, etc.) # for ext in EXTENSIONS: if basename.endswith(ext): basename = basename[:-len(ext)] return interpret_distro_name(location, basename, metadata) return [] # no extension matched def distros_for_filename(filename, metadata=None): """Yield possible egg or source distribution objects based on a filename""" return distros_for_location( normalize_path(filename), os.path.basename(filename), metadata ) def interpret_distro_name( location, basename, metadata, py_version=None, precedence=SOURCE_DIST, platform=None ): """Generate alternative interpretations of a source distro name Note: if `location` is a filesystem filename, you should call ``pkg_resources.normalize_path()`` on it before passing it to this routine! """ # Generate alternative interpretations of a source distro name # Because some packages are ambiguous as to name/versions split # e.g. "adns-python-1.1.0", "egenix-mx-commercial", etc. # So, we generate each possible interepretation (e.g. "adns, python-1.1.0" # "adns-python, 1.1.0", and "adns-python-1.1.0, no version"). In practice, # the spurious interpretations should be ignored, because in the event # there's also an "adns" package, the spurious "python-1.1.0" version will # compare lower than any numeric version number, and is therefore unlikely # to match a request for it. It's still a potential problem, though, and # in the long run PyPI and the distutils should go for "safe" names and # versions in distribution archive names (sdist and bdist). parts = basename.split('-') if not py_version: for i,p in enumerate(parts[2:]): if len(p)==5 and p.startswith('py2.'): return # It's a bdist_dumb, not an sdist -- bail out for p in range(1,len(parts)+1): yield Distribution( location, metadata, '-'.join(parts[:p]), '-'.join(parts[p:]), py_version=py_version, precedence = precedence, platform = platform ) # From Python 2.7 docs def unique_everseen(iterable, key=None): "List unique elements, preserving order. Remember all elements ever seen." # unique_everseen('AAAABBBCCDAABBB') --> A B C D # unique_everseen('ABBCcAD', str.lower) --> A B C D seen = set() seen_add = seen.add if key is None: for element in filterfalse(seen.__contains__, iterable): seen_add(element) yield element else: for element in iterable: k = key(element) if k not in seen: seen_add(k) yield element def unique_values(func): """ Wrap a function returning an iterable such that the resulting iterable only ever yields unique items. """ @wraps(func) def wrapper(*args, **kwargs): return unique_everseen(func(*args, **kwargs)) return wrapper REL = re.compile("""<([^>]*\srel\s*=\s*['"]?([^'">]+)[^>]*)>""", re.I) # this line is here to fix emacs' cruddy broken syntax highlighting @unique_values def find_external_links(url, page): """Find rel="homepage" and rel="download" links in `page`, yielding URLs""" for match in REL.finditer(page): tag, rel = match.groups() rels = set(map(str.strip, rel.lower().split(','))) if 'homepage' in rels or 'download' in rels: for match in HREF.finditer(tag): yield urljoin(url, htmldecode(match.group(1))) for tag in ("<th>Home Page", "<th>Download URL"): pos = page.find(tag) if pos!=-1: match = HREF.search(page,pos) if match: yield urljoin(url, htmldecode(match.group(1))) user_agent = "Python-urllib/%s setuptools/%s" % ( sys.version[:3], require('setuptools')[0].version ) class ContentChecker(object): """ A null content checker that defines the interface for checking content """ def feed(self, block): """ Feed a block of data to the hash. """ return def is_valid(self): """ Check the hash. Return False if validation fails. """ return True def report(self, reporter, template): """ Call reporter with information about the checker (hash name) substituted into the template. """ return class HashChecker(ContentChecker): pattern = re.compile( r'(?P<hash_name>sha1|sha224|sha384|sha256|sha512|md5)=' r'(?P<expected>[a-f0-9]+)' ) def __init__(self, hash_name, expected): self.hash_name = hash_name if hash_name == 'md5': self.hash = hashlib.new(hash_name, usedforsecurity=False) else: self.hash = hashlib.new(hash_name) self.expected = expected @classmethod def from_url(cls, url): "Construct a (possibly null) ContentChecker from a URL" fragment = urlparse(url)[-1] if not fragment: return ContentChecker() match = cls.pattern.search(fragment) if not match: return ContentChecker() return cls(**match.groupdict()) def feed(self, block): self.hash.update(block) def is_valid(self): return self.hash.hexdigest() == self.expected def report(self, reporter, template): msg = template % self.hash_name return reporter(msg) class PackageIndex(Environment): """A distribution index that scans web pages for download URLs""" def __init__( self, index_url="https://pypi.python.org/simple", hosts=('*',), ca_bundle=None, verify_ssl=True, *args, **kw ): Environment.__init__(self,*args,**kw) self.index_url = index_url + "/"[:not index_url.endswith('/')] self.scanned_urls = {} self.fetched_urls = {} self.package_pages = {} self.allows = re.compile('|'.join(map(translate,hosts))).match self.to_scan = [] if verify_ssl and ssl_support.is_available and (ca_bundle or ssl_support.find_ca_bundle()): self.opener = ssl_support.opener_for(ca_bundle) else: self.opener = urllib2.urlopen def process_url(self, url, retrieve=False): """Evaluate a URL as a possible download, and maybe retrieve it""" if url in self.scanned_urls and not retrieve: return self.scanned_urls[url] = True if not URL_SCHEME(url): self.process_filename(url) return else: dists = list(distros_for_url(url)) if dists: if not self.url_ok(url): return self.debug("Found link: %s", url) if dists or not retrieve or url in self.fetched_urls: list(map(self.add, dists)) return # don't need the actual page if not self.url_ok(url): self.fetched_urls[url] = True return self.info("Reading %s", url) self.fetched_urls[url] = True # prevent multiple fetch attempts f = self.open_url(url, "Download error on %s: %%s -- Some packages may not be found!" % url) if f is None: return self.fetched_urls[f.url] = True if 'html' not in f.headers.get('content-type', '').lower(): f.close() # not html, we can't process it return base = f.url # handle redirects page = f.read() if not isinstance(page, str): # We are in Python 3 and got bytes. We want str. if isinstance(f, HTTPError): # Errors have no charset, assume latin1: charset = 'latin-1' else: charset = f.headers.get_param('charset') or 'latin-1' page = page.decode(charset, "ignore") f.close() for match in HREF.finditer(page): link = urljoin(base, htmldecode(match.group(1))) self.process_url(link) if url.startswith(self.index_url) and getattr(f,'code',None)!=404: page = self.process_index(url, page) def process_filename(self, fn, nested=False): # process filenames or directories if not os.path.exists(fn): self.warn("Not found: %s", fn) return if os.path.isdir(fn) and not nested: path = os.path.realpath(fn) for item in os.listdir(path): self.process_filename(os.path.join(path,item), True) dists = distros_for_filename(fn) if dists: self.debug("Found: %s", fn) list(map(self.add, dists)) def url_ok(self, url, fatal=False): s = URL_SCHEME(url) if (s and s.group(1).lower()=='file') or self.allows(urlparse(url)[1]): return True msg = "\nLink to % s ***BLOCKED*** by --allow-hosts\n" if fatal: raise DistutilsError(msg % url) else: self.warn(msg, url) def scan_egg_links(self, search_path): for item in search_path: if os.path.isdir(item): for entry in os.listdir(item): if entry.endswith('.egg-link'): self.scan_egg_link(item, entry) def scan_egg_link(self, path, entry): lines = [_f for _f in map(str.strip, open(os.path.join(path, entry))) if _f] if len(lines)==2: for dist in find_distributions(os.path.join(path, lines[0])): dist.location = os.path.join(path, *lines) dist.precedence = SOURCE_DIST self.add(dist) def process_index(self,url,page): """Process the contents of a PyPI page""" def scan(link): # Process a URL to see if it's for a package page if link.startswith(self.index_url): parts = list(map( unquote, link[len(self.index_url):].split('/') )) if len(parts)==2 and '#' not in parts[1]: # it's a package page, sanitize and index it pkg = safe_name(parts[0]) ver = safe_version(parts[1]) self.package_pages.setdefault(pkg.lower(),{})[link] = True return to_filename(pkg), to_filename(ver) return None, None # process an index page into the package-page index for match in HREF.finditer(page): try: scan(urljoin(url, htmldecode(match.group(1)))) except ValueError: pass pkg, ver = scan(url) # ensure this page is in the page index if pkg: # process individual package page for new_url in find_external_links(url, page): # Process the found URL base, frag = egg_info_for_url(new_url) if base.endswith('.py') and not frag: if ver: new_url+='#egg=%s-%s' % (pkg,ver) else: self.need_version_info(url) self.scan_url(new_url) return PYPI_MD5.sub( lambda m: '<a href="%s#md5=%s">%s</a>' % m.group(1,3,2), page ) else: return "" # no sense double-scanning non-package pages def need_version_info(self, url): self.scan_all( "Page at %s links to .py file(s) without version info; an index " "scan is required.", url ) def scan_all(self, msg=None, *args): if self.index_url not in self.fetched_urls: if msg: self.warn(msg,*args) self.info( "Scanning index of all packages (this may take a while)" ) self.scan_url(self.index_url) def find_packages(self, requirement): self.scan_url(self.index_url + requirement.unsafe_name+'/') if not self.package_pages.get(requirement.key): # Fall back to safe version of the name self.scan_url(self.index_url + requirement.project_name+'/') if not self.package_pages.get(requirement.key): # We couldn't find the target package, so search the index page too self.not_found_in_index(requirement) for url in list(self.package_pages.get(requirement.key,())): # scan each page that might be related to the desired package self.scan_url(url) def obtain(self, requirement, installer=None): self.prescan() self.find_packages(requirement) for dist in self[requirement.key]: if dist in requirement: return dist self.debug("%s does not match %s", requirement, dist) return super(PackageIndex, self).obtain(requirement,installer) def check_hash(self, checker, filename, tfp): """ checker is a ContentChecker """ checker.report(self.debug, "Validating %%s checksum for %s" % filename) if not checker.is_valid(): tfp.close() os.unlink(filename) raise DistutilsError( "%s validation failed for %s; " "possible download problem?" % ( checker.hash.name, os.path.basename(filename)) ) def add_find_links(self, urls): """Add `urls` to the list that will be prescanned for searches""" for url in urls: if ( self.to_scan is None # if we have already "gone online" or not URL_SCHEME(url) # or it's a local file/directory or url.startswith('file:') or list(distros_for_url(url)) # or a direct package link ): # then go ahead and process it now self.scan_url(url) else: # otherwise, defer retrieval till later self.to_scan.append(url) def prescan(self): """Scan urls scheduled for prescanning (e.g. --find-links)""" if self.to_scan: list(map(self.scan_url, self.to_scan)) self.to_scan = None # from now on, go ahead and process immediately def not_found_in_index(self, requirement): if self[requirement.key]: # we've seen at least one distro meth, msg = self.info, "Couldn't retrieve index page for %r" else: # no distros seen for this name, might be misspelled meth, msg = (self.warn, "Couldn't find index page for %r (maybe misspelled?)") meth(msg, requirement.unsafe_name) self.scan_all() def download(self, spec, tmpdir): """Locate and/or download `spec` to `tmpdir`, returning a local path `spec` may be a ``Requirement`` object, or a string containing a URL, an existing local filename, or a project/version requirement spec (i.e. the string form of a ``Requirement`` object). If it is the URL of a .py file with an unambiguous ``#egg=name-version`` tag (i.e., one that escapes ``-`` as ``_`` throughout), a trivial ``setup.py`` is automatically created alongside the downloaded file. If `spec` is a ``Requirement`` object or a string containing a project/version requirement spec, this method returns the location of a matching distribution (possibly after downloading it to `tmpdir`). If `spec` is a locally existing file or directory name, it is simply returned unchanged. If `spec` is a URL, it is downloaded to a subpath of `tmpdir`, and the local filename is returned. Various errors may be raised if a problem occurs during downloading. """ if not isinstance(spec,Requirement): scheme = URL_SCHEME(spec) if scheme: # It's a url, download it to tmpdir found = self._download_url(scheme.group(1), spec, tmpdir) base, fragment = egg_info_for_url(spec) if base.endswith('.py'): found = self.gen_setup(found,fragment,tmpdir) return found elif os.path.exists(spec): # Existing file or directory, just return it return spec else: try: spec = Requirement.parse(spec) except ValueError: raise DistutilsError( "Not a URL, existing file, or requirement spec: %r" % (spec,) ) return getattr(self.fetch_distribution(spec, tmpdir),'location',None) def fetch_distribution( self, requirement, tmpdir, force_scan=False, source=False, develop_ok=False, local_index=None ): """Obtain a distribution suitable for fulfilling `requirement` `requirement` must be a ``pkg_resources.Requirement`` instance. If necessary, or if the `force_scan` flag is set, the requirement is searched for in the (online) package index as well as the locally installed packages. If a distribution matching `requirement` is found, the returned distribution's ``location`` is the value you would have gotten from calling the ``download()`` method with the matching distribution's URL or filename. If no matching distribution is found, ``None`` is returned. If the `source` flag is set, only source distributions and source checkout links will be considered. Unless the `develop_ok` flag is set, development and system eggs (i.e., those using the ``.egg-info`` format) will be ignored. """ # process a Requirement self.info("Searching for %s", requirement) skipped = {} dist = None def find(req, env=None): if env is None: env = self # Find a matching distribution; may be called more than once for dist in env[req.key]: if dist.precedence==DEVELOP_DIST and not develop_ok: if dist not in skipped: self.warn("Skipping development or system egg: %s",dist) skipped[dist] = 1 continue if dist in req and (dist.precedence<=SOURCE_DIST or not source): return dist if force_scan: self.prescan() self.find_packages(requirement) dist = find(requirement) if local_index is not None: dist = dist or find(requirement, local_index) if dist is None and self.to_scan is not None: self.prescan() dist = find(requirement) if dist is None and not force_scan: self.find_packages(requirement) dist = find(requirement) if dist is None: self.warn( "No local packages or download links found for %s%s", (source and "a source distribution of " or ""), requirement, ) else: self.info("Best match: %s", dist) return dist.clone(location=self.download(dist.location, tmpdir)) def fetch(self, requirement, tmpdir, force_scan=False, source=False): """Obtain a file suitable for fulfilling `requirement` DEPRECATED; use the ``fetch_distribution()`` method now instead. For backward compatibility, this routine is identical but returns the ``location`` of the downloaded distribution instead of a distribution object. """ dist = self.fetch_distribution(requirement,tmpdir,force_scan,source) if dist is not None: return dist.location return None def gen_setup(self, filename, fragment, tmpdir): match = EGG_FRAGMENT.match(fragment) dists = match and [ d for d in interpret_distro_name(filename, match.group(1), None) if d.version ] or [] if len(dists)==1: # unambiguous ``#egg`` fragment basename = os.path.basename(filename) # Make sure the file has been downloaded to the temp dir. if os.path.dirname(filename) != tmpdir: dst = os.path.join(tmpdir, basename) from setuptools.command.easy_install import samefile if not samefile(filename, dst): shutil.copy2(filename, dst) filename=dst file = open(os.path.join(tmpdir, 'setup.py'), 'w') file.write( "from setuptools import setup\n" "setup(name=%r, version=%r, py_modules=[%r])\n" % ( dists[0].project_name, dists[0].version, os.path.splitext(basename)[0] ) ) file.close() return filename elif match: raise DistutilsError( "Can't unambiguously interpret project/version identifier %r; " "any dashes in the name or version should be escaped using " "underscores. %r" % (fragment,dists) ) else: raise DistutilsError( "Can't process plain .py files without an '#egg=name-version'" " suffix to enable automatic setup script generation." ) dl_blocksize = 8192 def _download_to(self, url, filename): self.info("Downloading %s", url) # Download the file fp, tfp, info = None, None, None try: checker = HashChecker.from_url(url) fp = self.open_url(url) if isinstance(fp, HTTPError): raise DistutilsError( "Can't download %s: %s %s" % (url, fp.code,fp.msg) ) headers = fp.info() blocknum = 0 bs = self.dl_blocksize size = -1 if "content-length" in headers: # Some servers return multiple Content-Length headers :( sizes = get_all_headers(headers, 'Content-Length') size = max(map(int, sizes)) self.reporthook(url, filename, blocknum, bs, size) tfp = open(filename,'wb') while True: block = fp.read(bs) if block: checker.feed(block) tfp.write(block) blocknum += 1 self.reporthook(url, filename, blocknum, bs, size) else: break self.check_hash(checker, filename, tfp) return headers finally: if fp: fp.close() if tfp: tfp.close() def reporthook(self, url, filename, blocknum, blksize, size): pass # no-op def open_url(self, url, warning=None): if url.startswith('file:'): return local_open(url) try: return open_with_auth(url, self.opener) except (ValueError, httplib.InvalidURL): v = sys.exc_info()[1] msg = ' '.join([str(arg) for arg in v.args]) if warning: self.warn(warning, msg) else: raise DistutilsError('%s %s' % (url, msg)) except urllib2.HTTPError: v = sys.exc_info()[1] return v except urllib2.URLError: v = sys.exc_info()[1] if warning: self.warn(warning, v.reason) else: raise DistutilsError("Download error for %s: %s" % (url, v.reason)) except httplib.BadStatusLine: v = sys.exc_info()[1] if warning: self.warn(warning, v.line) else: raise DistutilsError( '%s returned a bad status line. The server might be ' 'down, %s' % (url, v.line) ) except httplib.HTTPException: v = sys.exc_info()[1] if warning: self.warn(warning, v) else: raise DistutilsError("Download error for %s: %s" % (url, v)) def _download_url(self, scheme, url, tmpdir): # Determine download filename # name, fragment = egg_info_for_url(url) if name: while '..' in name: name = name.replace('..','.').replace('\\','_') else: name = "__downloaded__" # default if URL has no path contents if name.endswith('.egg.zip'): name = name[:-4] # strip the extra .zip before download filename = os.path.join(tmpdir,name) # Download the file # if scheme=='svn' or scheme.startswith('svn+'): return self._download_svn(url, filename) elif scheme=='git' or scheme.startswith('git+'): return self._download_git(url, filename) elif scheme.startswith('hg+'): return self._download_hg(url, filename) elif scheme=='file': return url2pathname(urlparse(url)[2]) else: self.url_ok(url, True) # raises error if not allowed return self._attempt_download(url, filename) def scan_url(self, url): self.process_url(url, True) def _attempt_download(self, url, filename): headers = self._download_to(url, filename) if 'html' in headers.get('content-type','').lower(): return self._download_html(url, headers, filename) else: return filename def _download_html(self, url, headers, filename): file = open(filename) for line in file: if line.strip(): # Check for a subversion index page if re.search(r'<title>([^- ]+ - )?Revision \d+:', line): # it's a subversion index page: file.close() os.unlink(filename) return self._download_svn(url, filename) break # not an index page file.close() os.unlink(filename) raise DistutilsError("Unexpected HTML page found at "+url) def _download_svn(self, url, filename): url = url.split('#',1)[0] # remove any fragment for svn's sake creds = '' if url.lower().startswith('svn:') and '@' in url: scheme, netloc, path, p, q, f = urlparse(url) if not netloc and path.startswith('//') and '/' in path[2:]: netloc, path = path[2:].split('/',1) auth, host = splituser(netloc) if auth: if ':' in auth: user, pw = auth.split(':',1) creds = " --username=%s --password=%s" % (user, pw) else: creds = " --username="+auth netloc = host url = urlunparse((scheme, netloc, url, p, q, f)) self.info("Doing subversion checkout from %s to %s", url, filename) os.system("svn checkout%s -q %s %s" % (creds, url, filename)) return filename @staticmethod def _vcs_split_rev_from_url(url, pop_prefix=False): scheme, netloc, path, query, frag = urlsplit(url) scheme = scheme.split('+', 1)[-1] # Some fragment identification fails path = path.split('#',1)[0] rev = None if '@' in path: path, rev = path.rsplit('@', 1) # Also, discard fragment url = urlunsplit((scheme, netloc, path, query, '')) return url, rev def _download_git(self, url, filename): filename = filename.split('#',1)[0] url, rev = self._vcs_split_rev_from_url(url, pop_prefix=True) self.info("Doing git clone from %s to %s", url, filename) os.system("git clone --quiet %s %s" % (url, filename)) if rev is not None: self.info("Checking out %s", rev) os.system("(cd %s && git checkout --quiet %s)" % ( filename, rev, )) return filename def _download_hg(self, url, filename): filename = filename.split('#',1)[0] url, rev = self._vcs_split_rev_from_url(url, pop_prefix=True) self.info("Doing hg clone from %s to %s", url, filename) os.system("hg clone --quiet %s %s" % (url, filename)) if rev is not None: self.info("Updating to %s", rev) os.system("(cd %s && hg up -C -r %s >&-)" % ( filename, rev, )) return filename def debug(self, msg, *args): log.debug(msg, *args) def info(self, msg, *args): log.info(msg, *args) def warn(self, msg, *args): log.warn(msg, *args) # This pattern matches a character entity reference (a decimal numeric # references, a hexadecimal numeric reference, or a named reference). entity_sub = re.compile(r'&(#(\d+|x[\da-fA-F]+)|[\w.:-]+);?').sub def uchr(c): if not isinstance(c, int): return c if c>255: return unichr(c) return chr(c) def decode_entity(match): what = match.group(1) if what.startswith('#x'): what = int(what[2:], 16) elif what.startswith('#'): what = int(what[1:]) else: what = name2codepoint.get(what, match.group(0)) return uchr(what) def htmldecode(text): """Decode HTML entities in the given text.""" return entity_sub(decode_entity, text) def socket_timeout(timeout=15): def _socket_timeout(func): def _socket_timeout(*args, **kwargs): old_timeout = socket.getdefaulttimeout() socket.setdefaulttimeout(timeout) try: return func(*args, **kwargs) finally: socket.setdefaulttimeout(old_timeout) return _socket_timeout return _socket_timeout def _encode_auth(auth): """ A function compatible with Python 2.3-3.3 that will encode auth from a URL suitable for an HTTP header. >>> _encode_auth('username%3Apassword') u'dXNlcm5hbWU6cGFzc3dvcmQ=' """ auth_s = unquote(auth) # convert to bytes auth_bytes = auth_s.encode() # use the legacy interface for Python 2.3 support encoded_bytes = base64.encodestring(auth_bytes) # convert back to a string encoded = encoded_bytes.decode() # strip the trailing carriage return return encoded.rstrip() def open_with_auth(url, opener=urllib2.urlopen): """Open a urllib2 request, handling HTTP authentication""" scheme, netloc, path, params, query, frag = urlparse(url) # Double scheme does not raise on Mac OS X as revealed by a # failing test. We would expect "nonnumeric port". Refs #20. if netloc.endswith(':'): raise httplib.InvalidURL("nonnumeric port: ''") if scheme in ('http', 'https'): auth, host = splituser(netloc) else: auth = None if auth: auth = "Basic " + _encode_auth(auth) new_url = urlunparse((scheme,host,path,params,query,frag)) request = urllib2.Request(new_url) request.add_header("Authorization", auth) else: request = urllib2.Request(url) request.add_header('User-Agent', user_agent) fp = opener(request) if auth: # Put authentication info back into request URL if same host, # so that links found on the page will work s2, h2, path2, param2, query2, frag2 = urlparse(fp.url) if s2==scheme and h2==host: fp.url = urlunparse((s2,netloc,path2,param2,query2,frag2)) return fp # adding a timeout to avoid freezing package_index open_with_auth = socket_timeout(_SOCKET_TIMEOUT)(open_with_auth) def fix_sf_url(url): return url # backward compatibility def local_open(url): """Read a local path, with special support for directories""" scheme, server, path, param, query, frag = urlparse(url) filename = url2pathname(path) if os.path.isfile(filename): return urllib2.urlopen(url) elif path.endswith('/') and os.path.isdir(filename): files = [] for f in os.listdir(filename): if f=='index.html': fp = open(os.path.join(filename,f),'rb') body = fp.read() fp.close() break elif os.path.isdir(os.path.join(filename,f)): f+='/' files.append("<a href=%r>%s</a>" % (f,f)) else: body = ("<html><head><title>%s</title>" % url) + \ "</head><body>%s</body></html>" % '\n'.join(files) status, message = 200, "OK" else: status, message, body = 404, "Path not found", "Not found" return HTTPError(url, status, message, {'content-type':'text/html'}, StringIO(body))